This essay engages with Heidegger's attempt to re-think the human being. It shows that Heidegger re-thinks the human being by challenging the way the human being has been thought, and the mode of thinking traditionally used to think about the human being. I spend significant time discussing Heidegger's attempt before, in the final section, asking some critical questions of Heidegger's endeavour and pointing out how his analysis can re-invigorate contemporary attempts to understand the human being.